Genuine LiftMaster K41-0386-000 replacement toroidal transformer for the Maxum industrial DC operators.
Fitment: LiftMaster Maxum 2200 lb operators on 480VAC supply.
Sized to both door weight and supply voltage — check the voltage digit in your model number.
Ordering the right part depends on the full model number, which is printed on the operator label. Call GateHouse Supplies if you are not sure — we service these units every day.